This paper (referenced in the post) is also relevant. The application is to NBA basketball: "Incorporating Side Information into Probabilistic Matrix Factoriz

This paper (referenced in the post) is also relevant. The application is to NBA basketball: "Incorporating Side Information into Probabilistic Matrix Factorization Using Gaussian Processes." Ryan Prescott Adams, George E. Dahl, and Iain Murray. In Proceedings of the 26th Conference on Uncertainty in Artificial Intelligence, 2010. Paper: http://www.cs.toronto.edu/~gdahl/papers/dpmfNBA.pdf http://www.cs.toronto.edu/~gdahl/papers/dpmfNBA.pdf Code: http://www.cs.toronto.edu/~rpa/code/dpmf-nba.tgz http://www.cs.toronto.edu/~rpa/code/dpmf-nba.tgz